城市集中供热系统节能技术及热力站控制系统的研究

发布时间：2018-09-07 20:35

【摘要】：随着我国经济实力的不断提高,普通大众的环保观念也在逐渐增强,能源的节约已成为了一个不容忽视的问题。对于我国大多数的北方城市来说,集中供热是大势所趋。如何让城市供热系统最大限度的节省能源,是集中供热系统研究的一个主要问题。本文以太原市的集中供热作为为背景,介绍了国内外供热系统的发展现状,简要说明了热力站是如何通过自动控制系统实时调控温度压力的。从节能的角度,分析介绍了供热系统的能耗问题,并从三个方面提出了节能措施：首先,针对恒温供热能耗大的问题,提出了分时段变室温调节的方法,就是根据不同的用户需求,给出不同的供热方案,并从理论上加以证明了,这种方法可以达到不错的节能效果；其次,对于热力站运行设备耗电量大的问题,提出了分布式变频泵的设计方法,并在理论计算上和传统方案进行了比较；最后,针对热计量改造的问题,提出了几种不同的热计量方式,采用这些计量方式有助于增强热用户的节能意识。本文重点设计了热力站的自动控制系统,系统控制器选用了mox系列的控制器,并对热力站系统的硬件部分和软件部分分别进行了设计。同时,由于传统PID算法在热力站控制系统中并不能取得很好的控制效果,因此提出了带预估环节的模糊自整定PID的控制方法,应用matlab软件对其进行了仿真,证明了这种方法的可行性。除此之外,本文利用MCGS组态软件设计了热力站的上位监控画面,并针对城市中热力站与中央控制中心的通讯问题,本文采用了VPN技术并为其设计了网络结构。如今,太原市集中供热系统已投入正常运行,达到了设计的基本供热要求。
[Abstract]:With the continuous improvement of our country's economic strength, the general public's concept of environmental protection is also gradually strengthened, energy conservation has become a problem that can not be ignored. For most northern cities in China, central heating is the general trend. How to save energy to the maximum extent in urban heating system is a main problem in the research of central heating system. Based on the central heating system in Taiyuan, this paper introduces the development of heating system at home and abroad, and briefly explains how the thermal station controls the temperature and pressure in real time through the automatic control system. From the point of view of energy saving, the energy consumption problem of heating system is analyzed, and the energy saving measures are put forward from three aspects: firstly, aiming at the problem of high energy consumption of constant temperature heating, the method of adjusting room temperature by time is put forward. That is, according to different user needs, different heating schemes are given, and it is proved theoretically that this method can achieve good energy saving effect. Secondly, for the problem of large power consumption of the operation equipment of thermal power station, The design method of distributed frequency conversion pump is put forward and compared with the traditional scheme in theory calculation. Finally, several different heat metering methods are put forward to solve the problem of heat metering reform. The adoption of these metering methods helps to enhance the energy-saving awareness of thermal users. This paper focuses on the design of the automatic control system of the thermal station. The system controller selects the controller of mox series, and the hardware and software parts of the system are designed respectively. At the same time, because the traditional PID algorithm can not achieve good control effect in the thermal station control system, a fuzzy self-tuning PID control method with prediction link is proposed and simulated by matlab software. The feasibility of this method is proved. In addition, this paper uses the MCGS configuration software to design the upper monitor picture of the thermal station, and aiming at the communication between the thermal station and the central control center in the city, this paper adopts the VPN technology and designs the network structure for it. Now, Taiyuan central heating system has been put into normal operation, to meet the basic requirements of the design.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU995

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